Application service providing system and method and server apparatus and client apparatus for application service

Abstract

Disclosed is an application service providing system, including: An application service providing system, including: a server apparatus that generates information for a screen output of application programs as virtual rendering objects and sends commands using the virtual rendering objects as parameters to a client apparatus; and a client apparatus that receives the commands, generates actual rendering objects corresponding to the virtual rendering objects, and uses the actual rendering objects to execute the commands.

What is claimed is: 
     
         1 . An application service providing system, comprising:
 a server apparatus that generates information for screen output of application program as virtual rendering objects and sends commands using the virtual rendering objects as parameters to a client apparatus; and   a client apparatus that receives the commands, generates actual rendering objects corresponding to the virtual rendering objects, and uses the actual rendering objects to execute the commands.   
     
     
         2 . The application service providing system of  claim 1 , wherein the commands include a rendering command. 
     
     
         3 . The application service providing system of  claim 1 , wherein the information for the screen output includes window information. 
     
     
         4 . The application service providing system of  claim 3 , wherein the virtual rendering objects include a virtual window object. 
     
     
         5 . The application service providing system of  claim 4 , wherein the server apparatus manages the virtual window object independently from a window manager of an operating system of the server apparatus. 
     
     
         6 . A server apparatus for an application service, comprising:
 a virtual rendering object management unit that generates information for screen output of application program as virtual rendering objects and generates commands using the virtual rendering objects as parameters; and   a data sending and receiving unit that sends the commands to a client apparatus.   
     
     
         7 . The server apparatus of  claim 6 , wherein the commands include a rendering command. 
     
     
         8 . The server apparatus of  claim 6 , wherein the information for the screen output includes window information. 
     
     
         9 . The server apparatus of  claim 8 , wherein the virtual rendering objects include a virtual window object. 
     
     
         10 . The server apparatus of  claim 9 , wherein the virtual rendering object management unit manages the virtual window object independently from a window manager of an operating system of the server apparatus. 
     
     
         11 . A client apparatus for an application service, comprising:
 a data sending and receiving unit that generates information for screen output of application program as virtual rendering objects and receives commands using the virtual rendering objects as parameters; and   a command processing unit that generates actual rendering objects corresponding to the virtual rendering objects and executes the commands on the actual rendering objects.   
     
     
         12 . The client apparatus of  claim 11 , wherein the commands include a rendering command. 
     
     
         13 . The client apparatus of  claim 11 , wherein the information for the screen output includes window information. 
     
     
         14 . The client apparatus of  claim 13 , wherein the virtual rendering objects include a virtual window object. 
     
     
         15 . A method for providing an application service, comprising:
 calling, by application program included in a server, graphic rendering related API;   generating rendering objects required in the graphic rendering related API as virtual rendering objects; and   sending rendering commands using the generated virtual rendering objects as parameters to a client.   
     
     
         16 . The method of  claim 15 , wherein the virtual rendering objects include a virtual window object. 
     
     
         17 . The method of  claim 15 , further comprising:
 receiving, by the client, the command; and   generating actual rendering objects corresponding to the virtual rendering objects to execute the command.   
     
     
         18 . The method of  claim 17 , further comprising:
 calling a virtual callback function during the execution of the command;   sending the command corresponding to the virtual callback function to the server; and   calling, by the server, an actual callback function corresponding to the virtual callback function to execute the command.